Page 506
CHAPTER 5
May/12
9107
SERVICE MANUAL
CHAPTER 5
Page 506
Feb/11
283
SERVICE MANUAL
ISO 9650
3.3 Post operational packing vacuum test details
3.3.1 Ensure the nut, (Item 2 FIGURE 503), has been torqued correctly.
Please refer to Chapter 1, TABLE 1 for correct torque values.
3.3.2 Remove the plug, (Item 1 FIGURE 503), using the correct tool and a
suitable 3/8” square drive wrench.
3.3.3 Insert a standard airline A8 adaptor into the vacuum plug hole.
Connected the airline to a vacuum capable of sustaining 5 Psi
(gauge).
3.3.4 Vacuum down the H-pack to between 5-6 Psi, through the point from
which the plug was removed.
CAUTION:
A VACUUM OF 6 PSI MUST NOT BE EXCEEDED. WORK
QUICKLY THROUGH THE FOLLOWING STEP ONCE
VACUUM IS APPLIED. THE VACUUM MUST NOT BE LEFT
ON FOR EXTENDED PERIODS OF TIME, OTHERWISE
DAMAGE WILL RESULT. IT IS RECOMMENDED THAT
THE H-PACK SHOULD NOT BE SUBJECT TO VACUUM
FOR PERIODS IN EXCESS OF 20 MINUTES.
3.3.5 Record the exact “Start Pressure”. Allow liferaft to remain
undisturbed stand for minimum 5 minutes and record “End Pressure”.
NOTE:
“End pressure” should not be corrected for atmospheric/
temperature f
l
uctuations. During the 5 minute test it is
permissible to temporarily bung the valve body using
either the plug provided with the H-pack, or a clean
rubber bung from a standard Leaf
i
eld A8 top-up valve.
If using the plug, this will form a reliable temporary seal
when hand-tightened.
Location of vacuum valve & Humidity indicator
FIGURE 502
